Electronic equipment provided with cooling system

Abstract

An electronic equipment is provided, which comprises a liquid-cooling system and a cooling fan as a cooling system, efficiently cools the liquid-cooling system, and reduces fan noise. The electronic equipment is provided with a liquid-cooling system, in which heat generated in a heat generating portion is transmitted to a heat radiating portion with a liquid as a medium to achieve cooling, and an air-cooling system, in which heat transmitted to the heat radiating portion is forcedly cooled, and comprises a pump that circulates the liquid between the heat generating portion and the heat radiating portion, a fan that forcedly discharges heat of the heat radiating portion to an outside, a temperature sensor that detects temperature of the heat generating portion, and storage information that beforehand prescribes the relationship between temperature of the heat generating portion and voltages of the pump and the fan, the electronic equipment being constructed such that a pump voltage is raised without changing a fan voltage when the detected temperature exceeds a first temperature, and a fan voltage is raised when temperature detected by the temperature sensor exceeds a second temperature higher than the first temperature, thus further increasing a cooling capacity.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]The present application claims priority from JP-A-2003-291511, the entirety of which is hereby incorporated by reference.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to a cooling system for an electronic equipment, the cooling system comprising a liquid-cooling system that cools a heat generating portion with a liquid as a medium, and a forced air-cooling system that uses a fan to discharge heat transported from the heat generating portion to an outside.[0004]2. Description of the Related Art[0005]It is a well-known fact that semiconductors used in an electronic equipment, especially, semiconductors typified by CPU in an information processing equipment have developed amazingly, and have steadily followed a tendency toward an increase in calorific power and density. Correspondingly, a cooling system has also developed steadily as in a natural air-cooling system, in which heat is transmitted ...

AI Technical Summary

Benefits of technology

[0008]By the way, it has been thought that the liquid-cooling system has a great advantage in realization of reduced noise by an arrangement free from use of any fan in addition to its large heat transmitting capacity. Since the hybrid cooling system uses a fan, noise in the system is increased. Also, in the case where a fan and a pump for driving of a liquid are not balanced well in capacity, the fan is in some cases unnecessarily operated even when cooling can be achieved by increasing a fluid flow rate with the use of a pump, and such operation of the fan incurs an increase in noise and shortening of life of the fan in some cases.

[0009]It is an object of the invention to provide a control method for a fan and a pump in an electronic equipment provided with a liquid-cooling system and a fan air-cooling system as a cooling system, the method efficiently using the liquid-cooling system, suppressing an increase in noise produced by a fan, and achieving lengthening of the fan and a pump in life.

[0014]By adopting such construction, it is possible according to the invention to efficiently use a liquid-cooling system to suppress an increase in noise produced by the fan.

[0016]Further, since control takes account of a change in viscosity of a liquid that circulates in the system, it is possible to make efficient use of the liquid-cooling system at a high level. Also, excessive operations of both the fan and the pump can be suppressed, and there can be produced an effect that parts thereof are lengthened in life.

Problems solved by technology

Since the hybrid cooling system uses a fan, noise in the system is increased.

Also, in the case where a fan and a pump for driving of a liquid are not balanced well in capacity, the fan is in some cases unnecessarily operated even when cooling can be achieved by increasing a fluid flow rate with the use of a pump, and such operation of the fan incurs an increase in noise and shortening of life of the fan in some cases.

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